Hail in Niwot, CO on July 11, 2025
Radar-estimated up to 1.75" (golf ball size)
Weather radar estimated hail of up to 1.75" (golf ball size) over Niwot between 6:08 PM and 6:10 PM, from 2 separate radar hail signatures inside the town. No spotter or NOAA ground report was filed inside the town that day, which is common: most hail falls where nobody is measuring it.
What golf ball-size hail does to a roof
Hail this large routinely cracks and punctures asphalt shingles, dents metal vents and gutters, and can break skylights. Damage is often visible from the ground, but bruised shingles that look intact can still fail early. Radar describes the storm, not your shingles: the only way to know what a particular roof took is an inspection. Most homeowner policies set a deadline for reporting storm damage, so check your policy.
Every home inside a storm's radar footprint, scored by roof age, material and hail history, sold to a few roofers only so you are not the twentieth truck on the street.
Other Colorado towns hit on July 11
- Trail Side, CO · Jul 11, 2025radar up to 2.75" (baseball size) · 1 report
- Altona, CO · Jul 11, 2025radar up to 2.5" (tennis ball size)
- Fort Morgan, CO · Jul 11, 2025radar up to 2.25" (hen egg size) · 1 report
- Silver Cliff, CO · Jul 11, 2025radar up to 2" (hen egg size)
- Valdez, CO · Jul 11, 2025radar up to 2" (hen egg size)
- Boulder, CO · Jul 11, 2025radar up to 1.75" (golf ball size)
- Pierce, CO · Jul 11, 2025radar up to 1.75" (golf ball size)
- Lafayette, CO · Jul 11, 2025radar up to 1.5" (ping-pong ball size) · 2 reports
- Las Animas, CO · Jul 11, 2025radar up to 1.5" (ping-pong ball size) · 1 report
- Blue Sky, CO · Jul 11, 2025radar up to 1.25" (half dollar size)
- Gunbarrel, CO · Jul 11, 2025radar up to 1.25" (half dollar size) · 1 report
- Jackson Lake, CO · Jul 11, 2025radar up to 1" (quarter size)
Other hail days in Niwot
Radar sizes are estimates from NEXRAD hail signatures (NOAA Severe Weather Data Inventory) for the largest stones in a storm cell, not a measurement at any one home. Ground reports are National Weather Service local storm reports and the NOAA Storm Events Database, as filed. Town-level data only; this page shows no addresses and no homeowner information.